{"id":87216,"date":"2026-07-30T02:08:54","date_gmt":"2026-07-29T18:08:54","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/87216.html"},"modified":"2026-07-30T02:08:54","modified_gmt":"2026-07-29T18:08:54","slug":"%e5%a4%9a%e6%91%84%e5%83%8f%e5%a4%b4%e8%be%b9%e7%bc%98%e6%8e%a8%e7%90%86%e5%b8%a7%e5%90%8c%e6%ad%a5%e6%9c%ba%e5%88%b6%e8%ae%be%e8%ae%a1%ef%bc%9a%e7%a1%ac%e4%bb%b6mipi%e8%99%9a%e6%8b%9f%e9%80%9a","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/87216.html","title":{"rendered":"\u591a\u6444\u50cf\u5934\u8fb9\u7f18\u63a8\u7406\u5e27\u540c\u6b65\u673a\u5236\u8bbe\u8ba1\uff1a\u786c\u4ef6MIPI\u865a\u62df\u901a\u9053\u4e0e\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u7684\u6df7\u5408\u65b9\u6848"},"content":{"rendered":"

\u591a\u6444\u50cf\u5934\u8fb9\u7f18\u63a8\u7406\u5e27\u540c\u6b65\u673a\u5236\u8bbe\u8ba1：\u786c\u4ef6MIPI\u865a\u62df\u901a\u9053\u4e0e\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u7684\u6df7\u5408\u65b9\u6848<\/h2>\n

\u4e00\u3001\u591a\u6444\u50cf\u5934\u5e27\u540c\u6b65\u95ee\u9898\u5b9a\u4e49<\/h3>\n

\u96f6\u552e\u573a\u666f\u8fb9\u7f18\u63a8\u7406\u5e38\u9700\u591a\u6444\u50cf\u5934\u534f\u540c：\u8d27\u67b6\u6b63\u9762\u6444\u50cf\u5934\u6355\u83b7\u5546\u54c1\u72b6\u6001，\u4fa7\u9762\u6444\u50cf\u5934\u6355\u83b7\u987e\u5ba2\u884c\u4e3a，\u9876\u90e8\u6444\u50cf\u5934\u6355\u83b7\u4eba\u6d41\u5bc6\u5ea6\u3002\u4e09\u8def\u6444\u50cf\u5934\u5e27\u6570\u636e\u9700\u5728\u63a8\u7406\u5f15\u64ce\u4e2d\u8fdb\u884c\u65f6\u7a7a\u5bf9\u9f50，\u5426\u5219\u8de8\u89c6\u89d2\u5173\u8054\u63a8\u7406\u7ed3\u679c\u7684\u65f6\u95f4\u504f\u5dee\u53ef\u8fbe200ms\u4ee5\u4e0a，\u5bfc\u81f4\u884c\u4e3a\u4e0e\u5546\u54c1\u72b6\u6001\u5339\u914d\u5931\u6548\u3002<\/p>\n

\u5e27\u540c\u6b65\u8bef\u5dee\u6765\u6e90\u5206\u6790：<\/p>\n\n\u8bef\u5dee\u6e90\u5178\u578b\u503c\u7279\u5f81<\/tr>\n\n\n\n\n\n\n\n
\u6444\u50cf\u5934\u66dd\u5149\u65f6\u5dee<\/td>\n30~50ms<\/td>\n\u5404\u8def\u72ec\u7acb\u66dd\u5149\u89e6\u53d1<\/td>\n<\/tr>\n
MIPI CSI\u4f20\u8f93\u5ef6\u8fdf<\/td>\n2~5ms<\/td>\n\u5e26\u5bbd\u7ade\u4e89\u5bfc\u81f4\u5e27\u6392\u961f<\/td>\n<\/tr>\n
ISP\u5904\u7406\u5ef6\u8fdf<\/td>\n10~20ms<\/td>\n\u964d\u566a\/WDR\u5904\u7406\u4e0d\u540c<\/td>\n<\/tr>\n
DMA\u642c\u8fd0\u5ef6\u8fdf<\/td>\n1~3ms<\/td>\n\u603b\u7ebf\u4ef2\u88c1\u6392\u961f<\/td>\n<\/tr>\n
\u63a8\u7406\u5f15\u64ce\u8c03\u5ea6\u6296\u52a8<\/td>\n5~15ms<\/td>\nCPU\/NPU\u8d1f\u8f7d\u6ce2\u52a8<\/td>\n<\/tr>\n
\u7d2f\u8ba1\u6700\u5927\u504f\u5dee<\/td>\n48~93ms<\/td>\n\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u76ee\u6807：\u5c06\u4e09\u8def\u5e27\u540c\u6b65\u8bef\u5dee\u63a7\u5236\u5728\u226410ms，\u6ee1\u8db3\u8de8\u89c6\u89d2\u5173\u8054\u63a8\u7406\u7684\u65f6\u95f4\u4e00\u81f4\u6027\u8981\u6c42\u3002<\/p>\n

\u4e8c\u3001MIPI CSI-2\u865a\u62df\u901a\u9053\u786c\u4ef6\u540c\u6b65<\/h3>\n

MIPI CSI-2\u534f\u8bae\u652f\u6301\u6700\u591a4\u4e2a\u865a\u62df\u901a\u9053（VC0~VC3），\u53ef\u5728\u540c\u4e00\u7269\u7406CSI\u94fe\u8def\u4e0a\u533a\u5206\u4e0d\u540c\u6444\u50cf\u5934\u7684\u6570\u636e\u6d41\u3002RK3568\u7684ISP\u786c\u4ef6\u652f\u6301\u4e09\u8defVC\u5e76\u884c\u63a5\u6536\u4e0e\u5904\u7406，\u5728\u786c\u4ef6\u5c42\u9762\u5b9e\u73b0\u5e27\u5bf9\u9f50\u3002<\/p>\n

\u786c\u4ef6\u540c\u6b65\u673a\u5236：<\/p>\n

  • \u5916\u90e8\u540c\u6b65\u4fe1\u53f7（FSYNC）：\u7531SoC GPIO\u8f93\u51fa\u540c\u6b65\u8109\u51b2，\u4e09\u8def\u6444\u50cf\u5934\u5728\u540c\u4e00FSYNC\u4fe1\u53f7\u89e6\u53d1\u4e0b\u5f00\u59cb\u66dd\u5149<\/li>\n
  • MIPI VC\u5206\u914d：\u6444\u50cf\u59341\u2192VC0，\u6444\u50cf\u59342\u2192VC1，\u6444\u50cf\u59343\u2192VC2<\/li>\n
  • ISP\u591aVC\u63a5\u6536：ISP\u540c\u4e00\u65f6\u523b\u63a5\u6536\u4e09\u8defVC\u7684\u5e27\u6570\u636e，\u4fdd\u8bc1\u5e27\u5230\u8fbe\u65f6\u95f4\u5dee\u22641ms<\/li>\n

    FSYNC\u4fe1\u53f7\u9891\u7387\u8bbe\u5b9a\u4e3a10fps（\u6bcf100ms\u4e00\u6b21\u540c\u6b65），\u4e09\u8def\u6444\u50cf\u5934\u5728FSYNC\u89e6\u53d1\u540e\u768430ms\u66dd\u5149\u7a97\u53e3\u5185\u5b8c\u6210\u91c7\u96c6，ISP\u572850ms\u5185\u5b8c\u6210\u4e09\u8def\u5e27\u5904\u7406\u3002\u786c\u4ef6\u540c\u6b65\u540e\u7684\u5e27\u5230\u8fbe\u65f6\u95f4\u5dee\u22642ms\u3002<\/p>\n

    \/\/ FSYNC\u8109\u51b2\u751f\u6210\u4e0e\u591a\u8def\u6444\u50cf\u5934\u540c\u6b65\u63a7\u5236
    \n#include "gpio_driver.h"
    \n#include "mipi_csi_driver.h"<\/p>\n

    #define FSYNC_GPIO_PIN GPIO_PIN_17
    \n#define CAM_SYNC_PERIOD_MS 100 \/\/ 10fps\u540c\u6b65\u5468\u671f<\/p>\n

    typedef struct {
    \n int vc_id; \/\/ MIPI\u865a\u62df\u901a\u9053\u7f16\u53f7
    \n uint64_t hw_timestamp; \/\/ ISP\u786c\u4ef6\u65f6\u95f4\u6233(\u7eb3\u79d2)
    \n uint8_t *frame_buf; \/\/ \u5e27\u7f13\u51b2\u6307\u9488
    \n int frame_len; \/\/ \u5e27\u6570\u636e\u957f\u5ea6
    \n} cam_frame_t;<\/p>\n

    \/\/ FSYNC\u8109\u51b2\u751f\u6210（\u5b9a\u65f6\u5668\u4e2d\u65ad\u56de\u8c03）
    \nstatic void fsync_pulse_generate(void)
    \n{
    \n \/\/ \u4ea7\u751fFSYNC\u8109\u51b2: \u9ad8\u7535\u5e73100\u03bcs
    \n gpio_set_level(FSYNC_GPIO_PIN, 1);
    \n usleep(100);
    \n gpio_set_level(FSYNC_GPIO_PIN, 0);
    \n}<\/p>\n

    \/\/ ISP\u4e09\u8defVC\u5e27\u63a5\u6536\u521d\u59cb\u5316
    \nint mipi_csi_multi_vc_init(void)
    \n{
    \n int ret;<\/p>\n

    \/\/ \u914d\u7f6eCSI\u63a5\u6536\u4e09\u8def\u865a\u62df\u901a\u9053
    \n csi_vc_config_t vc_cfg[3] = {
    \n { .vc_id = 0, .width = 640, .height = 480, .fmt = CSI_FMT_YUYV },
    \n { .vc_id = 1, .width = 640, .height = 480, .fmt = CSI_FMT_YUYV },
    \n { .vc_id = 2, .width = 320, .height = 240, .fmt = CSI_FMT_YUYV },
    \n };<\/p>\n

    for (int i = 0; i < 3; i++) {
    \n ret = csi_vc_configure(vc_cfg[i]);
    \n if (ret < 0) {
    \n fprintf(stderr, " CSI VC%d\u914d\u7f6e\u5931\u8d25: %d\\\\n", i, ret);
    \n return ret;
    \n }
    \n }<\/p>\n

    \/\/ \u542f\u52a8ISP\u591aVC\u63a5\u6536\u6a21\u5f0f
    \n ret = isp_multi_vc_start(3);
    \n if (ret < 0) {
    \n fprintf(stderr, " ISP\u591aVC\u542f\u52a8\u5931\u8d25: %d\\\\n", ret);
    \n return ret;
    \n }<\/p>\n

    return 0;
    \n}<\/p>\n

    \u4e09\u3001\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u4e0e\u5e27\u7f13\u51b2\u7ba1\u7406<\/h3>\n

    \u786c\u4ef6FSYNC\u53ef\u6d88\u9664\u66dd\u5149\u65f6\u5dee，\u4f46ISP\u5904\u7406\u5ef6\u8fdf\u4e0eDMA\u642c\u8fd0\u5ef6\u8fdf\u4ecd\u6709\u5dee\u5f02\u3002\u8f6f\u4ef6\u5c42\u9700\u5bf9\u6bcf\u5e27\u9644\u52a0\u7cbe\u786e\u65f6\u95f4\u6233，\u5e76\u5728\u63a8\u7406\u8f93\u5165\u7aef\u505a\u65f6\u95f4\u7a97\u53e3\u5bf9\u9f50\u3002<\/p>\n

    \u65f6\u95f4\u6233\u6765\u6e90：ISP VIC（\u89c6\u9891\u4e2d\u65ad\u5b8c\u6210）\u65f6\u523b\u7684\u7cfb\u7edf\u5355\u8c03\u65f6\u949f（clock_gettime CLOCK_MONOTONIC_RAW），\u7cbe\u5ea6\u8fbe\u7eb3\u79d2\u7ea7\u3002<\/p>\n

    \/\/ \u5e27\u65f6\u95f4\u6233\u6807\u6ce8\u4e0e\u7f13\u51b2\u961f\u5217\u7ba1\u7406
    \n#include <time.h>
    \n#include <pthread.h><\/p>\n

    #define SYNC_WINDOW_MS 10 \/\/ \u540c\u6b65\u7a97\u53e3\u5bb9\u5fcd\u504f\u5dee10ms
    \n#define FRAME_QUEUE_DEPTH 8 \/\/ \u6bcf\u8def\u961f\u5217\u6df1\u5ea6<\/p>\n

    typedef struct {
    \n cam_frame_t frames[FRAME_QUEUE_DEPTH];
    \n int head, tail;
    \n pthread_mutex_t lock;
    \n} frame_queue_t;<\/p>\n

    static frame_queue_t cam_queues[3]; \/\/ \u4e09\u8def\u5e27\u961f\u5217<\/p>\n

    \/\/ ISP\u5e27\u5b8c\u6210\u4e2d\u65ad\u56de\u8c03：\u6807\u6ce8\u65f6\u95f4\u6233\u5e76\u5165\u961f
    \nstatic void isp_frame_done_callback(int vc_id, uint8_t *buf, int len)
    \n{
    \n if (vc_id < 0 || vc_id >= 3) {
    \n fprintf(stderr, " VC\u7f16\u53f7\u5f02\u5e38: %d\\\\n", vc_id);
    \n return;
    \n }<\/p>\n

    struct timespec ts;
    \n clock_gettime(CLOCK_MONOTONIC_RAW, &ts);<\/p>\n

    cam_frame_t frame = {
    \n .vc_id = vc_id,
    \n .hw_timestamp = ts.tv_sec * 1000000000ULL + ts.tv_nsec,
    \n .frame_buf = buf,
    \n .frame_len = len,
    \n };<\/p>\n

    frame_queue_t *q = &cam_queues[vc_id];
    \n pthread_mutex_lock(&q->lock);<\/p>\n

    if ((q->tail + 1) % FRAME_QUEUE_DEPTH == q->head) {
    \n \/\/ \u961f\u5217\u6ee1,\u4e22\u5f03\u6700\u65e7\u5e27
    \n q->head = (q->head + 1) % FRAME_QUEUE_DEPTH;
    \n fprintf(stderr, " VC%d\u5e27\u961f\u5217\u6ea2\u51fa,\u4e22\u5f03\u65e7\u5e27\\\\n", vc_id);
    \n }<\/p>\n

    q->frames[q->tail] = frame;
    \n q->tail = (q->tail + 1) % FRAME_QUEUE_DEPTH;<\/p>\n

    pthread_mutex_unlock(&q->lock);
    \n}<\/p>\n

    \u4e09\u8def\u5e27\u65f6\u95f4\u7a97\u53e3\u5bf9\u9f50\u7b97\u6cd5：\u53d6\u4e09\u8def\u961f\u5217\u4e2d\u65f6\u95f4\u6233\u6700\u8fd1\u7684\u5e27\u7ec4\u5408，\u8981\u6c42\u6700\u5927\u65f6\u95f4\u504f\u5dee\u226410ms\u3002<\/p>\n

    \/\/ \u4e09\u8def\u5e27\u65f6\u95f4\u7a97\u53e3\u5bf9\u9f50（\u6700\u8fd1\u65f6\u95f4\u5339\u914d\u7b97\u6cd5）
    \nint align_three_cam_frames(cam_frame_t *aligned[3])
    \n{
    \n if (aligned == NULL) return ERR_NULL_PARAM;<\/p>\n

    \/\/ \u4ece\u4e09\u8def\u961f\u5217\u5404\u53d6\u4e00\u5e27
    \n cam_frame_t *f0 = queue_peek_latest(&cam_queues[0]);
    \n cam_frame_t *f1 = queue_peek_latest(&cam_queues[1]);
    \n cam_frame_t *f2 = queue_peek_latest(&cam_queues[2]);<\/p>\n

    if (f0 == NULL || f1 == NULL || f2 == NULL) {
    \n fprintf(stderr, " \u81f3\u5c11\u4e00\u8def\u5e27\u961f\u5217\u4e3a\u7a7a,\u65e0\u6cd5\u5bf9\u9f50\\\\n");
    \n return ERR_FRAME_NOT_READY;
    \n }<\/p>\n

    \/\/ \u8ba1\u7b97\u4e09\u5e27\u65f6\u95f4\u6233\u6700\u5927\u504f\u5dee
    \n uint64_t t_min = f0->hw_timestamp;
    \n uint64_t t_max = f0->hw_timestamp;<\/p>\n

    if (f1->hw_timestamp < t_min) t_min = f1->hw_timestamp;
    \n if (f1->hw_timestamp > t_max) t_max = f1->hw_timestamp;
    \n if (f2->hw_timestamp < t_min) t_min = f2->hw_timestamp;
    \n if (f2->hw_timestamp > t_max) t_max = f2->hw_timestamp;<\/p>\n

    uint64_t delta_ms = (t_max – t_min) \/ 1000000ULL;<\/p>\n

    if (delta_ms > SYNC_WINDOW_MS) {
    \n fprintf(stderr, " \u4e09\u8def\u5e27\u65f6\u95f4\u504f\u5dee%llums\u8d85\u8fc7\u540c\u6b65\u7a97\u53e3%dms\\\\n",
    \n delta_ms, SYNC_WINDOW_MS);
    \n \/\/ \u5c1d\u8bd5\u4ece\u504f\u5927\u65f6\u95f4\u6233\u7684\u961f\u5217\u53d6\u66f4\u65e7\u5e27\u4ee5\u7f29\u5c0f\u504f\u5dee
    \n if (t_max == f1->hw_timestamp) {
    \n f1 = queue_peek_older(&cam_queues[1], 1);
    \n } else if (t_max == f2->hw_timestamp) {
    \n f2 = queue_peek_older(&cam_queues[2], 1);
    \n }<\/p>\n

    if (f1 == NULL || f2 == NULL) {
    \n return ERR_SYNC_TIMEOUT;
    \n }<\/p>\n

    \/\/ \u4e8c\u6b21\u6821\u9a8c\u504f\u5dee
    \n t_min = f0->hw_timestamp;
    \n t_max = f0->hw_timestamp;
    \n if (f1->hw_timestamp < t_min) t_min = f1->hw_timestamp;
    \n if (f1->hw_timestamp > t_max) t_max = f1->hw_timestamp;
    \n if (f2->hw_timestamp < t_min) t_min = f2->hw_timestamp;
    \n if (f2->hw_timestamp > t_max) t_max = f2->hw_timestamp;
    \n delta_ms = (t_max – t_min) \/ 1000000ULL;<\/p>\n

    if (delta_ms > SYNC_WINDOW_MS) {
    \n fprintf(stderr, " \u4e8c\u6b21\u5bf9\u9f50\u4ecd\u8d85\u504f\u5dee\u9608\u503c,\u4e22\u5f03\u672c\u8f6e\\\\n");
    \n return ERR_SYNC_TIMEOUT;
    \n }
    \n }<\/p>\n

    aligned[0] = f0;
    \n aligned[1] = f1;
    \n aligned[2] = f2;
    \n return 0;
    \n}<\/p>\n

    \u56db\u3001\u63a8\u7406\u5f15\u64ce\u591a\u5e27\u8f93\u5165\u8c03\u5ea6<\/h3>\n

    \u5bf9\u9f50\u540e\u7684\u4e09\u8def\u5e27\u9700\u5728\u63a8\u7406\u5f15\u64ce\u4e2d\u8fdb\u884c\u8054\u5408\u5904\u7406\u3002\u8c03\u5ea6\u7b56\u7565\u91c7\u7528"\u4e3b\u5e27\u9a71\u52a8"\u6a21\u5f0f：\u4ee5\u8d27\u67b6\u6b63\u9762\u6444\u50cf\u5934（VC0）\u4e3a\u4e3b\u5e27，\u4fa7\u9762\u4e0e\u9876\u90e8\u5e27\u4f5c\u4e3a\u8f85\u52a9\u8f93\u5165\u3002<\/p>\n

    \u63a8\u7406\u8c03\u5ea6\u65f6\u5e8f\u7ea6\u675f：\u4e09\u8def\u63a8\u7406\u5171\u4eabCPU\/NPU\u8d44\u6e90，\u9700\u4e32\u884c\u8c03\u5ea6\u4ee5\u907f\u514d\u8d44\u6e90\u7ade\u4e89\u3002\u8c03\u5ea6\u987a\u5e8f\u4e0e\u8017\u65f6：<\/p>\n\n\u63a8\u7406\u4efb\u52a1\u6267\u884c\u5355\u5143\u8017\u65f6\u4f18\u5148\u7ea7<\/tr>\n\n\n\n\n\n
    VC0\u5546\u54c1\u68c0\u6d4b(YOLOv8s)<\/td>\nNPU<\/td>\n98ms<\/td>\n\u6700\u9ad8<\/td>\n<\/tr>\n
    VC1\u884c\u4e3a\u8bc6\u522b(\u5173\u952e\u70b9+\u5206\u7c7b)<\/td>\nCPU<\/td>\n87ms<\/td>\n\u9ad8<\/td>\n<\/tr>\n
    VC2\u4eba\u6d41\u5bc6\u5ea6(MobileNet)<\/td>\nNPU(\u6392\u961f)<\/td>\n15ms<\/td>\n\u4f4e<\/td>\n<\/tr>\n
    \u8de8\u89c6\u89d2\u5173\u8054<\/td>\nCPU<\/td>\n5ms<\/td>\n\u6700\u9ad8(\u4f9d\u8d56\u524d\u4e09\u4e2a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u603b\u63a8\u7406\u8017\u65f6：98+87+15+5=205ms\u3002NPU\u4e0eCPU\u5e76\u884c\u53ef\u51cf\u5c11\u81f398+87(\u91cd\u53e0)=\u7ea6130ms（VC0\u5728NPU\u8fd0\u884c\u65f6，VC1\u540c\u65f6\u5728CPU\u8fd0\u884c）\u3002<\/p>\n

    \/\/ \u63a8\u7406\u5f15\u64ce\u591a\u5e27\u8c03\u5ea6\u6838\u5fc3\u4ee3\u7801
    \n#include "scheduler.h"<\/p>\n

    int run_multi_cam_inference(cam_frame_t *aligned[3], inference_result_t *result)
    \n{
    \n if (aligned == NULL || result == NULL) {
    \n fprintf(stderr, " \u63a8\u7406\u8f93\u5165\/\u8f93\u51fa\u6307\u9488\u4e3a\u7a7a\\\\n");
    \n return ERR_NULL_PARAM;
    \n }<\/p>\n

    \/\/ \u9636\u6bb51: NPU\u63a8\u7406VC0\u5546\u54c1\u68c0\u6d4b（\u540c\u65f6CPU\u63a8\u7406VC1\u884c\u4e3a\u8bc6\u522b）
    \n inference_task_t task0 = {
    \n .engine = ENGINE_NPU,
    \n .model = MODEL_YOLOV8S,
    \n .input = aligned[0]->frame_buf,
    \n .priority = TASK_PRIORITY_HIGH,
    \n };
    \n inference_task_t task1 = {
    \n .engine = ENGINE_CPU,
    \n .model = MODEL_KEYPOINT_CLASSIFY,
    \n .input = aligned[1]->frame_buf,
    \n .priority = TASK_PRIORITY_HIGH,
    \n };<\/p>\n

    \/\/ \u5e76\u884c\u63d0\u4ea4NPU\u4e0eCPU\u4efb\u52a1
    \n int ret = scheduler_submit_parallel(task0, task1);
    \n if (ret < 0) {
    \n fprintf(stderr, " \u5e76\u884c\u63a8\u7406\u63d0\u4ea4\u5931\u8d25: %d\\\\n", ret);
    \n return ret;
    \n }<\/p>\n

    \/\/ \u9636\u6bb52: NPU\u63a8\u7406VC2\u4eba\u6d41\u5bc6\u5ea6（\u6392\u961f\u7b49\u5f85NPU\u91ca\u653e）
    \n inference_task_t task2 = {
    \n .engine = ENGINE_NPU,
    \n .model = MODEL_MOBILENET_V2,
    \n .input = aligned[2]->frame_buf,
    \n .priority = TASK_PRIORITY_LOW,
    \n };
    \n ret = scheduler_submit(task2);
    \n if (ret < 0) {
    \n fprintf(stderr, " VC2\u63a8\u7406\u63d0\u4ea4\u5931\u8d25: %d\\\\n", ret);
    \n \/\/ \u4f4e\u4f18\u5148\u7ea7\u4efb\u52a1\u5931\u8d25\u4e0d\u5f71\u54cd\u4e3b\u7ed3\u679c
    \n }<\/p>\n

    \/\/ \u9636\u6bb53: \u8de8\u89c6\u89d2\u5173\u8054\u63a8\u7406
    \n ret = cross_view_correlate(result->shelf_status,
    \n result->action_class,
    \n result->crowd_density,
    \n &result->alert);
    \n if (ret < 0) {
    \n fprintf(stderr, " \u8de8\u89c6\u89d2\u5173\u8054\u5931\u8d25: %d\\\\n", ret);
    \n return ret;
    \n }<\/p>\n

    return 0;
    \n}<\/p>\n

    \u5b9e\u6d4b\u4e09\u8def\u5e27\u540c\u6b65\u7cbe\u5ea6：<\/p>\n\n\u6307\u6807\u65e0FSYNCFSYNC+\u65f6\u95f4\u6233\u5bf9\u9f50\u6539\u5584\u5e45\u5ea6<\/tr>\n\n\n\n\n\n
    \u4e09\u8def\u5e27\u65f6\u95f4\u504f\u5dee<\/td>\n48~93ms<\/td>\n3~8ms<\/td>\n-83~91%<\/td>\n<\/tr>\n
    \u63a8\u7406\u603b\u5ef6\u8fdf<\/td>\n205ms<\/td>\n130ms(\u5e76\u884c)<\/td>\n-37%<\/td>\n<\/tr>\n
    \u5bf9\u9f50\u6210\u529f\u7387<\/td>\n72%<\/td>\n96%<\/td>\n+24%<\/td>\n<\/tr>\n
    \u5e27\u4e22\u5f03\u7387<\/td>\n8%<\/td>\n2%<\/td>\n-6%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    FSYNC\u786c\u4ef6\u540c\u6b65\u5c06\u5e27\u5230\u8fbe\u504f\u5dee\u4ece4893ms\u964d\u81f32ms，\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u8fdb\u4e00\u6b65\u5c06\u5904\u7406\u5ef6\u8fdf\u5dee\u5f02\u63a7\u5236\u572838ms\u5185，\u7efc\u5408\u540c\u6b65\u7cbe\u5ea6\u22648ms，\u6ee1\u8db310ms\u76ee\u6807\u3002<\/p>\n

    \u4e94\u3001\u603b\u7ed3<\/h3>\n

    \u591a\u6444\u50cf\u5934\u8fb9\u7f18\u63a8\u7406\u5e27\u540c\u6b65\u673a\u5236\u7684\u6838\u5fc3\u5de5\u7a0b\u6570\u636e：<\/p>\n\n\u9879\u76ee\u65e0\u540c\u6b65\u65b9\u6848\u6df7\u5408\u540c\u6b65\u65b9\u6848\u6539\u5584<\/tr>\n\n\n\n\n\n\n\n
    \u5e27\u65f6\u95f4\u504f\u5dee(\u6700\u5927)<\/td>\n93ms<\/td>\n8ms<\/td>\n-91%<\/td>\n<\/tr>\n
    \u63a8\u7406\u603b\u5ef6\u8fdf<\/td>\n205ms<\/td>\n130ms<\/td>\n-37%<\/td>\n<\/tr>\n
    \u5bf9\u9f50\u6210\u529f\u7387<\/td>\n72%<\/td>\n96%<\/td>\n+24%<\/td>\n<\/tr>\n
    FSYNC\u9891\u7387<\/td>\n\u2014<\/td>\n10fps(100ms\u5468\u671f)<\/td>\n\u2014<\/td>\n<\/tr>\n
    MIPI VC\u6570\u91cf<\/td>\n1(\u65f6\u5206\u590d\u7528)<\/td>\n3(\u5e76\u884c)<\/td>\n+2<\/td>\n<\/tr>\n
    \u5e27\u7f13\u51b2\u603bRAM<\/td>\n3\u00d7640KB=1.9MB<\/td>\n3\u00d78\u5e27\u00d7640KB=15MB<\/td>\n\u9700\u8bc4\u4f30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u6df7\u5408\u65b9\u6848（MIPI\u865a\u62df\u901a\u9053\u786c\u4ef6FSYNC + \u8f6f\u4ef6\u65f6\u95f4\u6233\u7a97\u53e3\u5bf9\u9f50）\u5c06\u4e09\u8def\u5e27\u540c\u6b65\u504f\u5dee\u4ece93ms\u964d\u81f38ms，\u6ee1\u8db3\u226410ms\u7684\u8de8\u89c6\u89d2\u5173\u8054\u63a8\u7406\u65f6\u95f4\u4e00\u81f4\u6027\u8981\u6c42\u300215MB\u5e27\u7f13\u51b2\u57282GB RAM\u5e73\u53f0\u4e0a\u5360\u6bd4<1%，\u53ef\u63a5\u53d7\u3002\u540e\u7eed\u4f18\u5316\u65b9\u5411：\u5c06FSYNC\u9891\u7387\u4ece10fps\u63d0\u5347\u81f315fps\u4ee5\u7f29\u77ed\u540c\u6b65\u5468\u671f，\u4ee5\u53ca\u5728NPU\u4fa7\u63a2\u7d22\u591a\u6a21\u578bbatch\u63a8\u7406\u4ee5\u51cf\u5c11VC0\u4e0eVC2\u4e4b\u95f4\u7684NPU\u6392\u961f\u5ef6\u8fdf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u591a\u6444\u50cf\u5934\u8fb9\u7f18\u63a8\u7406\u5e27\u540c\u6b65\u673a\u5236\u8bbe\u8ba1：\u786c\u4ef6MIPI\u865a\u62df\u901a\u9053\u4e0e\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u7684\u6df7\u5408\u65b9\u6848
    \n\u4e00\u3001\u591a\u6444\u50cf\u5934\u5e27\u540c\u6b65\u95ee\u9898\u5b9a\u4e49
    \n\u96f6\u552e\u573a\u666f\u8fb9\u7f18\u63a8\u7406\u5e38\u9700\u591a\u6444\u50cf\u5934\u534f\u540c：\u8d27\u67b6\u6b63\u9762\u6444\u50cf\u5934\u6355\u83b7\u5546\u54c1\u72b6\u6001，\u4fa7\u9762\u6444\u50cf\u5934\u6355\u83b7\u987e\u5ba2\u884c\u4e3a，\u9876\u90e8\u6444\u50cf\u5934\u6355\u83b7\u4eba\u6d41\u5bc6\u5ea6\u3002\u4e09\u8def\u6444\u50cf\u5934\u5e27\u6570\u636e\u9700\u5728\u63a8\u7406\u5f15\u64ce\u4e2d\u8fdb\u884c\u65f6\u7a7a\u5bf9\u9f50，\u5426\u5219\u8de8\u89c6\u89d2\u5173\u8054\u63a8\u7406\u7ed3\u679c\u7684\u65f6\u95f4\u504f\u5dee\u53ef\u8fbe200ms\u4ee5\u4e0a，\u5bfc\u81f4\u884c\u4e3a\u4e0e\u5546\u54c1\u72b6\u6001\u5339\u914d\u5931\u6548\u3002
    \n\u5e27\u540c\u6b65\u8bef\u5dee\u6765\u6e90\u5206\u6790：
    \n\u8bef\u5dee\u6e90\u5178\u578b\u503c\u7279\u5f81<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[50],"topic":[],"class_list":["post-87216","post","type-post","status-publish","format-standard","hentry","category-server","tag-50"],"yoast_head":"\n\u591a\u6444\u50cf\u5934\u8fb9\u7f18\u63a8\u7406\u5e27\u540c\u6b65\u673a\u5236\u8bbe\u8ba1\uff1a\u786c\u4ef6MIPI\u865a\u62df\u901a\u9053\u4e0e\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u7684\u6df7\u5408\u65b9\u6848 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/87216.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u591a\u6444\u50cf\u5934\u8fb9\u7f18\u63a8\u7406\u5e27\u540c\u6b65\u673a\u5236\u8bbe\u8ba1\uff1a\u786c\u4ef6MIPI\u865a\u62df\u901a\u9053\u4e0e\u8f6f\u4ef6\u65f6\u95f4\u6233\u5bf9\u9f50\u7684\u6df7\u5408\u65b9\u6848 - 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